3Ph Controller on Single Phase

[480volt]

A few observations:

The motor rating plate indicates that it is single-voltage. This is not surprising as the controller voltage range isn’t that great.

Dual-voltage three phase motors sold in the US are usually nine-lead, where each winding is divided in half and you connect them either in series (hi voltage) or parallel (low voltage). European motors are more commonly wound so that you can configure them as wye or delta to change the voltage. I have been a commercial/industrial electrician in California for decades and have yet to come across one of these.

Somewhere, I have seen a reference from a manufacturer directing the user to add a capacitor to allow a three-phase motor to run on single-phase, however, if the motor is not designed for this it will overheat.

Looks like you have to run the style of motor that came with it because of the clutch/brake setup. It would be a long shot, but maybe one of the dealers on this board has a 120V single-phase version of this motor? Then you may only need to boost the voltage to the controller.

Is the circuit available dedicated or  is it sharing with other machines?

Assuming you do get it to work, you will be relying on old electronics that likely need a backup machine to cannibalize for parts if something fails. Just some factors to weigh before you get into it for a lot of money.

 

[Gymnast]

On ‎1‎/‎6‎/‎2020 at 4:12 PM, 480volt said:

The motor rating plate indicates that it is single-voltage.

Well - I read Pole 2 Ph. 3.  on the motor rating plate. A 2-pole motor with 3 phases. I get the current rating right with a cosphi about 0.8 for such a motor and resonalbe losses. And the first Photo show 3 leads to the motor. That is why I belived it should be a 3-phase motor with a phase-phase voltage of 220 V. Apparently you read something else.

You are right, that the motor can very well be arranged with the connections to the windings in another way than I anticipated, so you cannot make a triangle connection. But then you can do the parallel connection and go from there. I think it is possible to make the motor run with a capacitor, if you accept that the motor do not have the same shaft power anymore, and you do need to have an applicable motor protection circuit. You only need a small capacitor in order for the motor to start. But it may only have left half motor shaft power after you have finished what to do here!

In general aggree with you, that keeping old electronics and motor should be considered before investing too much in it.

[Handstitched]

I know this is a different machine,but similar issue with voltages,  I do have a USM 20 T  Hyptronic press,but its 3Ph, I can't use it .

We dont have 3 phase anywhere in the street . I also considered a converter, but, the power going to my workshop comes from the house, its 10A  ( 240v) , and the converter requires 15A ( 240v Australia) . The next option is to have 15A   installed in the workshop at great expense, with no guarantee  of success . Its the ' start up' that will draw the most current as the fly wheel inside the machine is massive  and very heavy, and I don't think a converter will cut it.  

I was once quoted over $ 1000- to change the motor to single ph. 

On 1/8/2020 at 6:52 AM, Gymnast said:

In general aggree with you, that keeping old electronics and motor should be considered before investing too much in it.

I'm thinking the same. I'll just buy a cheap 3 ph generator, when I win Lotto 

HS